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Xunjing had given him that pile of books on genetics, and he had read them carefully.
He had a fairly clear understanding of genetic contamination.
It was definitely nothing good.
Of course, since he had yet to sign a contract with Xunjing and had no idea that Xunjing held a better, higher path in his hands, the Second Hokage felt that even if Mount Myoboku's Senjutsu carried a risk of genetic contamination, it might not prove fatal.
As long as practitioners did not maintain Sage Mode for long periods and only activated it briefly during battle, they might never encounter those side effects in their entire lives.
"You're sharp, all right. You spotted the crux of it immediately."
Hearing Orochimaru's words, Xunjing's lips curved slightly. He nodded in affirmation. "Last night, I tried practicing Mount Myoboku's Senjutsu..."
Then Xunjing gave Orochimaru a rough account of part of his training process and the conclusions he had drawn.
With the Second Hokage present, he deliberately left out a whole series of core secrets, including the Essence Chakra Refinement Technique.
He only shared his new discoveries and understanding of Senjutsu.
"According to my research, practicing the Senjutsu of Mount Myoboku, or even any of the Three Sacred Lands, introduces an external force that continuously affects and erodes the practitioner's genes, causing contamination."
"If you practice Senjutsu for a long time, or even gradually replace all the chakra in your body with senjutsu chakra, that contamination will accelerate dramatically."
"You can guess what the consequences would be, can't you?"
Xunjing stared straight at Orochimaru and asked, emphasizing every word.
"Hiss-then this really is a serious problem!"
Orochimaru fully understood the implications behind Xunjing's words.
He, too, had signed a contract and practiced the Essence Chakra Refinement Technique, so the slightest hint was enough.